Lubricator.



PATENTBD NOV. l, 1904.

M. F. DOLPHIN.

LUBRIGATOR. APPLIoATioN FILED MAY 1a. 1904.

N0 MODEL.

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W/T/VESSES:

M flyw @y A WOR/v5 y No. 774,050. Patented November 1, 1904.

UNITED STATES PATENT OEEICE.

MICHAEL F. DOLPHIN, OF SCRANTON, PENNSYLVANIA.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 774,050, dated November` 1, 1904. Application filed May 13, 1904. Serial No. 207,839. (No model.)

T0 @ZZ 11171/0711/ it Hwy 007%0671171: or the like; but this attachment may be dis- Beit known that I, MICHAELF. DoLrHlN, of pensed with` if desired, and the bottom Scranton, in the county of Lackawanna and equipped with a narrow tapered outlet-open- State of Pennsylvania, have invented certain ing. The said reduced end of the bottom is new and usefullmprovements in Lubricators; l preferably exteriorly threaded to accommoand l do hereby declare the following to be a l date a binding-nut 12 for preventing slipping full, clear, and exact description of the invenor loosening of the lubricator when in use. tion, such as will enable others skilled in the 13 is a piston within the cup, which piston art to which it appertains to make and use carries a washer 14:, of leather or other suitthe same. able material, to aid in preventing the lubri The objects of this invention are, first, to cant from working above the piston. The so construct a lubricator as toy prevent the latter is normally'under the tension of a coillubricant from escaping beyond the piston l spring 15, which encircles astem 16, extended which bears thereon to force it outwardly; l upwardly from the center of the piston. This secondly, to enable the pressure on the lubristem at its upper end projects into an air-tight cant to be readily increased or lessened acchamber 17, formed on the top of the cup. cording to the feed it is desired-to maintain, This chamber is Jorrned by a glass tube 18, and, thirdly, to provide means for indicating resting at its lower end on a packing-ring 19, the amount of the lubricant withinacup whose i surrounding the opening into the chamber, and at its outer end it is engaged by a packing-ring 20. The tube is held air-tight by an inclosing cap 21, threaded at its lower endI to engage an exteriorly-thrcaded flange 22, extending outwardly from the top of the cup. This cap is equipped with one or more sightopenings 23, whereby the conditions within the cup-that is to say, the quantity of lubricant beneath the piston-will be indicated by the position of the stem 16. Thus not only is provision made for readily ascertaining the position of the piston, but the chamber 211 above the latter is made air-tight, and all danger of loss of the lubricant is thus avoided.

In practice to fill the cup with lubricant the nut 7is loosened and the cup 1 is removed. The lubricant is placed on the bottom 5, whereupon the cup is repositioned and secured by tightening the nut 7. The cup is turned axially, according to the pressure it is desired the piston should exert against the lubricant, and thus time the outflow thereof. Once the cup is adjusted it cannot work loose, being held by its binding-nut bearing against that portion of the bottom overlapping the exterior thread of the cup. As the quantity of the lubricant lessens the piston will gradually move toward the bottom under the tension of its spring, and its position is readily ascerwalls are not transparent.

The invention will be hereinafter fullyset forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of a lubricator embodying my improvements. Fig. 2 is a view in perspective of the sight-feed-tube cap. Fig. 3 is a view of the cup-binding nut, shown on a smaller scale than in Fig. 1.

Referring to the drawings, 1 designates a cylindrical cup formed with an interior thread 2 and an exterior thread 3, the former working in a'thread l of the bottom 5. This loottom is formed with an outer concentric wall 6, which is designed to overlap the lower end of the cup, with a space between itself and the threaded portion of the bottom to accommodate the cup, which latter may be readily adjusted by being turned axially. It is held as against slipping by a binding-nut 7 working in the outer thread 3 and designed to bear against the edge of the cylindrical wall 6. The bottom 5 is preferably convexedly curved (like a funnel) on its inner surface, and into its lower reduced end may be screwed a sleeve 8, having a ball 9 for insuring the outiiow of the lubricant through openings 10, such ball being designed to engage with a rotary shaft tainable at a glance through the sight-openings of the cap by which the sight-tube is held air-tight.

The advantages of my invention are apparent to those skilled in the art.

I claim as my invention-- 1. A lubricator comprising' a cup having interior and exterior threads, a bottom having an exterior thread with which the interior thread of the cup is designed to engage, and also having an outer portion overlapping the exterior thread of the cup, a binding-nut on such thread engaging said overlapping' portion, and a spring-pressed piston within the cup.

2. A lubricator comprising a cup having interior and exterior threads, a bottom having' an exterior thread with which the interior thread of the cup is designed to engage, and

also having an outer concentric wall overlapping the exterior thread of the cup, a binding-nut on such thread `for en gaging said wall, and a spring-pressed piston within the cup.

3. A lubricator comprising a cup having an air-tight chamber therein, a piston movable in said chamber, a sight-tube in the top of the cup, and an indicator carried by the piston extending from said chamber into said sight-tube.

4L. A lubricator comprising a cup having an air-tight chamber therein, a piston movable in said chamber, a sight-tube in the top of the cup, and a stem extended from said piston through said chamber into said sight-tube.

[ A lubricator comprising a cup having an airtight chamber therein, a piston movable i in said chamber, a sight-tube in the top of the f cup, a cap for holdingsaid tube having' a sightj opening', and an indicator carried by the piston extending into said sight-tube. i 6. The combination with the cup having an air-tight chamber, a piston therein having an l l upwardly-extended stem, a sight-tube in the top of the cup having packing at its upper and lower ends, and a cap for binding said tube and packing together, said cap having a sight-opening therein.

7. The herein-described lu bricator comprising' a cup having interior and exterior threads, a bottom having' an exterior thread with which the interior thread of the cup engages, said bottom also having an outer concentric wall, a binding-nut on the exterior of the cup for engaging said wall, a spring-pressed piston within said cup having an upwardly extended stein, an air-tight chamber on the top of the cup into which said stem projects, and an inclosing cap having a sight-opening, as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

MICHAEL F. DOLPHIN.

\Vitnesses:

Amas F. BELL, l F. V. HUMBERT. 

